First PyGame program
Based on my previous post of researching viable applications to make a simple game in, I decided to delve a bit into PyGame.
Since my brain is so heavily inundated with making Processing sketches, I based the code structure around core Processing concepts (setup() function, draw() function, etc). While it’s probably not the best solution for writing a PyGame app (the liberal usage of ‘global’ calls), it does actually run, which is all I wanted 
What does it do? Spawn a bunch of random circles and have them bounce around the screen. Exciting? Not very. But, you gotta start somewhere 😉
# pyGameTest02.py
# Eric Pavey - 2009-04-06
# Writing a PyGame app that emulates the general program layout of a Processing sketch.
# Makes a bunch of random circles bounce around.
import pygame
from pygame.locals import *
import random
RES = [640, 480]
MAXCIR = 128
window = None
screen = None
circles = []
class Cir(object):
# Make our circle objects
def __init__(self):
self.xPos = RES[0]/2
self.yPos = RES[1]/2
self.xDir = random.choice([random.uniform(0,2),random.uniform(-2,0)])
self.yDir = random.choice([random.uniform(0,2),random.uniform(-2,0)])
self.radius = random.uniform(8,64)
self.width = random.uniform(2,8)
def move(self):
self.xPos = self.xPos + 1 * self.xDir
if self.xPos + self.radius/2 + self.width > RES[0] or self.xPos < self.radius/2 + self.width:
self.xDir = self.xDir * -1
self.yPos = self.yPos + 1 * self.yDir
if self.yPos + self.radius/2 + self.width > RES[1] or self.yPos < self.radius/2 + self.width:
self.yDir = self.yDir * -1
def draw(self):
# must make all vals int:
pygame.draw.circle(screen, Color('white'), [int(self.xPos), int(self.yPos)], int(self.radius), int(self.width))
def run(self):
self.move()
self.draw()
def setup():
# Initialize startup parameters
global window
global screen
pygame.init()
window = pygame.display.set_mode(RES)
pygame.display.set_caption('PyGame Test 02')
screen = pygame.display.get_surface()
screen.fill(Color('black'))
def draw():
# Run main loop:
global screen
global circles
run = True
while run:
screen.fill(Color('black'))
for c in circles:
c.run()
if len(circles) < MAXCIR:
circles.append(Cir())
pygame.display.update()
for e in pygame.event.get():
if e.type == QUIT:
run = False
break
if __name__ == "__main__":
setup()
draw()